Gas-burner.



E. R. BRAYSHAW.

GAS BURNER.

APPLICATION FILED 1111.11.17, 1911.

1,024,398., Patented A131223, 19121 5 SHEETS-SHEET 1.

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GAS BURNER.

-APPLIOATION FILED 111111.17, 1911.

140242893., Patented Apr. 23, 1912.

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wlTNEssEs INVENTOR E. R. BRAYSHAW.

GAS BURNER.

APPLICATION FILED MAR.17, 1911.

Patented Apr. 23, 1912.

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l NVENTO W kay muwiwdaw WITNESSES E. R. BRAYSHAW.

GAS BURNER.

APPLICATION FILED MAR. 17, 1911.

1,924,393., y Patented. Apr. 23, 1912.

5 SHEETS-SHEET 4.

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GAS BURNER.

APPLICATION FILED MAR. 17. 1911. 1,024,393.. Patented Apr. 23, 1912.

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hi C) hi hi C) `Dh h5 D hakh2 /K k da 2 K M Fig? mgm. wrrNEssEs ENVENWR w Z'm-37lgyd/w EDMUND RUSSELL BRAYSHAW, OF MANCHESTER, ENGLAND.

GAS-BURNER.

Specicaton of Letters Patent.

Patented Apr. 23, 1912.

Application filed March 17, 1911. Serial No. 615,075.

To all whom' it may concern.

Be 'it known that I, EDMUND RUSSELL BRAYSHAW, a British'subject, residing at Hulme, Manchester, county of Lancaster, England, have invented certain new and useful Improvementsl in Gas-Burners, of which the following is a specification.

This invention relates to gas burners for heating furnaces such as are employed for melting metals in crucibles and is,designed to provide an improved arrangement and construction of burner in which the gas or air will be thoroughly mixed to enable a given quantity of gas to produce a higher temperature or a given temperature to be obtained with less gas and with compressed air at a lower pressure.

The invention .will be fully described with reference to the accompanying drawings orming part of the specification.

Figure l, is a side elevation of the furnace, showing the burner applied thereto. Fig. 2, is a part plan of the furnace (which is built in pairs) showing the burner applied thereto. Fig. 3, is a front elevation of the burner. Fig. 4, is an enlarged sectional eleburner tube.

vation of the burner and a part of the furnace. Fig. 5, is a sectional'elevation of the burner from the front. elevation through the heating inlet of the furnace showing the prptecting block on the end of the burner tube. Fig. 7, is a Asectional plan of the same. 'Fig. 8, is a sectional plan through the heating inlet ofthe furnace showing a modification with the protecting block surrounding the end of the Fig. 9 is a vertical sectional view showing a slightly modified construction of mixing burne`r. Fig. 10 is asimilar view showing a further modified construction of t-he same.

The furnace A is constructed in the usual way of refractory material with a chamber a to receive a crucible B and a heating in let C at the side through which the outlet tube d2 of the burner D enters.

The furnace is built -in pairs, with a horizontal flue a leading from near the front of each to the vertical flue a2, each ofthe lues a being provided with a separate damper a3 so that one may be shut off or regulated independently of the other.

`The burner D is constructed with a gas inlet pipe d and air inlet pipe 0 3 and an outlet or delivery pipe d2 which enters the furnace. .The air pipe d (see Figs. 4. and

Fig. 6, is a sectional,

5) is connected to a nozzle E in the interior of the burner which is conical internally and of less capacity than the air pipe d so that the air is caused to issue therefrom in a jet at an increased velocity. The exterior of the nozzle is enlarged at e and tapers to the outlet. The nozzle E is fitted in a gas chamber F with which the gas pipe d connects, the gas chamber being enlarged at f to receive the full volume of gas and contracted around the nozzle E and then tapering beyond the end of the nozzle to a narrower passage f. The air is blown in under pressure and the passage f is lled with a( mixture of gas and air.

In a modified form of the burner (see Figs. 9 and l0) for use with gas under pressure the gas inlet pipe ai is fitted with a nozzle or injector E through which the supply of gas `issues in a jet, and the passage f is formed with an open or flaring air inlet f2 to allow the air supply to be drawn in by the jet issuing from the nozzle E. The supply of air is regulated by a regulating plate R placed over the nozzle E and litted on a pillar r as in Fig. 9. Or if desired a regulating plate R. of conical form and fitted upon the nozzle E as in Fig. 10, may be employed. The regulator R or R-as the case may be-is secured in position by a set screw or pinching screw r and may be adjusted to or from the air inlet f2 to admit a greater or lessquantity of air according to the pressure, or velocity, or volume or weight of the gas jet issuing from the nozzle E.

Beyond the passage f a mixing chamber G is provided in which is arranged a baH'le plate H having a conical projection 71, against which the air and gas impinge causing the mixed gases to flow outwardly in all directions and assuring a complete mixture. The chamber G extends out annularly at g beyond the batlie H and the gas and air flow around the baie H and through holes h therein into a passage through the center thereof to the deliverypipe cl2. The annular opening around battle H is continued beyond opening L as shown at h3. The baffle H is threaded into the chamber G and the outlet pipe is connected to the former by a union coupling h2. The outlet pipe d2 is fitted at its delivery end with a protecting block K which may be of cast iron and fits against a block lc (see Figs.

l, 6 and 7) at the end of the hea-ting inlet C and the end of the heating inlet is'preferably facedwith a block o of heat resisting material. Or as shown in Fig. 8 the end of the heating inlet C may be plugged with a block c into which the delivery pipe d2 of the burner is fitted. Or any other suitable or convenient method of discharging the gas and air into the furnace may be employed.

What I claim as my invention and desire to protect by Letters Patent is 1. A gas burner of the type set forth comprising a casing having gas and air admission means, a receiving passage f for the gas and ai'r passed by said means, and a mixing chamber communicating with the discharge end of the receiving passage; a hollow baflie H arranged concentrically in the mixing chamber inspaced relation to the adjacent wall of the latter andA provided at its upper end with a conical projection and on its sides With openings which aEord communication between the mixing chamber and the interior of the baie; and a delivery pipe d2 for conducting the mixed air and gas-from the interior of the baiiie to the furnace.

2. A gas burner of the type set forth comprisin a casing having gas and air inlets, a receiving passage f for the gas and air and a mixing chamber G communicating with the discharge end of the receiving passage; a nozzle E connected to the air inlet and passing the air in the form of a jet to the receiving passage, the burner casing having a space concentric to the nozzle and communicating at one end with the gas inlet and at the other end with the receiving passage; a hollow baie H arranged concentrically in the mixing chamber in spaced relation to the adjacent wall of the latter and having openings which afford communication between the mixing chamber and the interior of the baie; and a delivering pipe cl2 for conducting the mixed air and gas from the interior of the ba'le to the furnace.

3. A gas'burner of the type set forth comprising a casing having gas and air admission means, a receiving passage f for the gas and air passed by said means, and a mixing chamber communicatingwith the discharge end of the receiving passage and having an annular pocket at the upper end thereof; a hollow baffle H arranged concentrically -in the mixing chamber in spaced relation to the adjacent wall of the latter and provided at its upper end with a conical projection to deliect the gas and air issuing from said assage into said pocket, and on its sides wlth openings which afford communication between the mixing chamber and the interior of the baffle; and a delivery pipe d2 for conducting the mixed air and gas from the interior ofthe baiie to the furnace. In testimony whereof I affix my signature in presence of two witnesses.

' E. RUSSELL BRAYSHAW.

Witnesses:

J. OWDEN OBRIEN,l HARRY BARNFATHER. 

